Insulation foam
Sghetti string
Styrene rods
.50 in quarters

Got the pool opened up this year and was able to finally test an R/C boat in it. Within a half hour, I was trying to tow a Joe on water skis...it did not work. I carved some foam into a ridable raft...closer but needed some fine tuning. I made the raft more of a pontoon and finally had to add .50 worth of ballast to the back to keep it from submarining on tight turns, or whenever the boat stopped, or, whenever I ran over it with the boat, "Oh that's not good." ~ Shoe Addict